Kribensis fry

Hey people, My paired kribensis just had fry count 29, have put parents and fry in there own separate tank as they were becoming too protective, anyway my question is i can't keep them as i don't have the room unfortunately, (rookie mistake getting M&F) at what age/size could I look to rehome them? They are only 1 weeks old... TIA (medway Kent area if anyone would be interested when they're ready)